Free Online Practice for Math, English & Logic
Adaptive questions that get harder as you improve. No signup, no timers — just practice.
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Know immediately if you're on track
Get it right and move on. Get it wrong and try again — the next question adapts to your level.
- Instant visual feedback
- Adaptive difficulty
- No timers, no pressure
Why adaptive beats static
Practice PDFs from the internet are static — repeat them as many times as you like and you get the same questions. Promsob tracks your performance at the sub-skill level (40+ skills, e.g. arithmetic, percentages, proportions, grammar topics and logic types) and adjusts the question set automatically, drilling the skills you get wrong most often.
Promsob questions use the same formats as general aptitude tests — multiple choice and numeric answer.
Why promsob
100% Free
Unlimited practice questions at no cost.
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Open the site and start practicing immediately — no account needed.
Adaptive Difficulty
The adaptive engine adjusts question difficulty to your level in real time.
Timed Exam Mode
Simulate real exam conditions with a built-in timer and practice time management.
Progress Stats
Track your scores, strengths, weaknesses and improvement over time.
Subject coverage
Mathematics
- Arithmetic
- Percentages
- Proportions
- Averages
- Age problems
- Number sequences
- Basic accounting
Preparing for an exam?
If you're preparing for OCSC (ก.พ.), BAAC (ธ.ก.ส.) or a state bank exam — our practice covers the quantitative, logic and English skills those exams test.
We don't hold an archive of past papers — every question is built to train the skills those exams actually test.
Sample questions with solutions
If 20% of a number is 30, what is the number?
Solution
- 20% = 20/100 = 1/5, so one-fifth of the number is 30
- The number = 30 × 5 = 150
- Answer: B. 150
She ___ to school every day.
Solution
- "every day" marks a habit, so use the Simple Present tense
- "She" is third-person singular, so the verb takes -s/-es
- Answer: B. goes